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   Arcadia Reference - Perform SYSTEM NEED ANALYSIS
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   <h1>
    <a href="../ARCADIA/540c5d7f937e408ba28cdff329b4d3ca.html">
     Perform SYSTEM NEED ANALYSIS
    </a>
   </h1>
   <p style="margin-top:3px; margin-bottom:3px">
    <span class="elementMetaClass">
     Engineering activity
    </span>
    <p>
    </p>
   </p>
   <em class="elementPath">
    <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html">
     Engineering activities
    </a>
    &gt;
    <a href="../ARCADIA/e8747730cd7549f9bc5a6e7fd12fdf1f.html">
     Arcadia high-level Activities
    </a>
    &gt;
    <a href="../ARCADIA/540c5d7f937e408ba28cdff329b4d3ca.html">
     Perform SYSTEM NEED ANALYSIS
    </a>
   </em>
   <p>
    <p>
     This perspective focuses on the system itself, in order to define how it can contribute to satisfy the former operational needs, along with its expected behavior and qualities. The main goal at that point is to check the feasibility of stakeholders requirements (cost, schedule, technology readiness, etc.) and if necessary, to provide means to renegotiate their content.
    </p>
    <p>
     Outputs of this engineering activity mainly consist of system functional need descriptions (system capabilities, functions or services, functional chains, and scenarios), interoperability and interaction with the users and external systems (functions, exchanges plus non-functional constraints).
    </p>
    <p>
     &nbsp;
    </p>
    <h2>
     Engineering goals
    </h2>
    <ul>
     <li>
      Define functional and non-functional need/expectations for system/SW
     </li>
     <li>
      Check Feasibility of Requirements (tech., cost, schedule, ...)
     </li>
     <li>
      Find most structuring/constraining Requirements for operational purpose
     </li>
     <li>
      Evaluate their impact on design &amp; integration &ndash; therefore their cost range
     </li>
     <li>
      Confront Requirements with Reuse opportunities
     </li>
     <li>
      Get technical Material to support Negotiation by evaluating operational added value of each requirement
     </li>
    </ul>
    <p>
     &nbsp;
    </p>
    <h2>
     Tasks to be completed during this step
    </h2>
    <ul>
     <li>
      Perform a Capability Trade-off Analysis
     </li>
     <li>
      Perform a functional and non-functional Analysis
     </li>
     <li>
      Formalise and consolidate Requirements
     </li>
    </ul>
    <p>
     &nbsp;
    </p>
    <h2>
     Stop Criteria
    </h2>
    <p>
     This activity is achieved when are obtained
    </p>
    <ul>
     <li>
      risk mitigation on System/SW definition (requirements consistency, functional need validity, cost estimation, adequacy to operational need)
     </li>
     <li>
      and sufficient definition for decision making to proceed with further design (early architecture &amp; EPBS, requirements, system/SW functional need)
     </li>
     <li>
      it usually requires agreement with higher level stakeholders (incl. customer).
     </li>
    </ul>
    <p>
     &nbsp;
    </p>
    <h2>
     Contributors &amp; Competencies
    </h2>
    <p>
     Major competencies required to complete this step are suggested below:
    </p>
    <table align="left" border="0" cellpadding="0" cellspacing="0">
     <tbody>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p align="center">
         <strong>
          Required Competencies
         </strong>
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p align="center">
         <strong>
          Major Expected Contribution
         </strong>
        </p>
       </td>
       <td style="width: 170px; height: 16px;">
        <p align="center">
         <strong>
          Possible Contributors (*)
         </strong>
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p>
         <strong>
          Domain knowledge
         </strong>
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p align="center">
         &nbsp;
        </p>
       </td>
       <td rowspan="13" style="width: 170px; height: 16px;">
        <p>
         &nbsp;
        </p>
        <ul>
         <li>
          Chief architect
         </li>
         <li>
          Customer
         </li>
         <li>
          Systems engineering manager
         </li>
         <li>
          Functional analyst
         </li>
         <li>
          Specialty engineering expert
         </li>
         <li>
          IVVQ manager
         </li>
         <li>
          Product line manager
         </li>
         <li>
          Simulation expert
         </li>
         <li>
          Program manager
         </li>
        </ul>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p>
         Product &amp; Technical Domain (incl. Product line)
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p>
         Product line constraints, capability gaps
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p align="center">
         <strong>
          Systems engineering - Design
         </strong>
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p align="center">
         &nbsp;
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p>
         Functional&nbsp; &amp; non functional Analysis
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p>
         System Analysis
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p>
         Modeling &amp; viewpoint engineering techniques
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p>
         Modeling techniques
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p>
         Value Engineering
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p>
         Cost effectiveness of functions
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p align="center">
         <strong>
          Systems engineering - Specialties
         </strong>
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p align="center">
         &nbsp;
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p>
         Technico-operational simulation
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p>
         Adequacy to operational scenarios &amp; OA
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p>
         Technical Simulation
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p>
         validity of functional behaviour
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p>
         Specialties engineering (safety, perf, RAMST&hellip;)
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p>
         Non-functional constraints
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p align="center">
         <strong>
          Systems engineering / IVVQ
         </strong>
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p>
         &nbsp;
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p>
         Test &amp; Trials Strategy Plan
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p>
         Relevant non-functional scenarios
        </p>
       </td>
      </tr>
      <tr>
       <td style="width: 267px; height: 16px;">
        <p>
         Integration means definition
        </p>
       </td>
       <td style="width: 227px; height: 16px;">
        <p>
         Functional/non-functional test capabilities
        </p>
       </td>
      </tr>
     </tbody>
    </table>
    <div style="clear: both;">
     &nbsp;
    </div>
    <p>
     (*) Depending on each organisation, competencies may be allocated to different actors; the following contributors list is therefore just an example to be adapted to each organisation:
    </p>
   </p>
   <h2>
    Details of Outputs Contents
   </h2>
   <ul>
    <li>
     <img alt="ExchangeItem" src="../icon/ExchangeItemData.gif"/>
     <a href="../ARCADIA/3492bf3bdbed47bb8512362f073e32e3.html">
      System &amp; external actors
     </a>
    </li>
    <li>
     <img alt="ExchangeItem" src="../icon/ExchangeItemData.gif"/>
     <a href="../ARCADIA/9a1e972e89064347b75e0b8b732e2b89.html">
      System Need Data
     </a>
    </li>
    <li>
     <img alt="ExchangeItem" src="../icon/ExchangeItemData.gif"/>
     <a href="../ARCADIA/0791ed419a47461a8a04dc927b798d19.html">
      System Capabilities
     </a>
    </li>
    <li>
     <img alt="ExchangeItem" src="../icon/ExchangeItemData.gif"/>
     <a href="../ARCADIA/6b8c9992db5b4e46aa6aa780d20dc91f.html">
      System requirements
     </a>
    </li>
    <li>
     <img alt="ExchangeItem" src="../icon/ExchangeItemData.gif"/>
     <a href="../ARCADIA/445a527db4a74857b671f6ff05da8baa.html">
      System Need functional Analysis
     </a>
    </li>
   </ul>
   <h2>
    Details of Inputs Contents
   </h2>
   <ul>
    <li>
     <img alt="ExchangeItem" src="../icon/ExchangeItemData.gif"/>
     <a href="../ARCADIA/52fb9fe57b4d48b1abaf29d68ecd1f44.html">
      Operational functional Analysis
     </a>
    </li>
    <li>
     <img alt="ExchangeItem" src="../icon/ExchangeItemData.gif"/>
     <a href="../ARCADIA/6623c0dc99fd47fcac9218fb173ee363.html">
      Stakeholders requirements
     </a>
    </li>
    <li>
     <img alt="ExchangeItem" src="../icon/ExchangeItemData.gif"/>
     <a href="../ARCADIA/71d4580456c140f98e92ddbd2396d59b.html">
      Operational Data
     </a>
    </li>
    <li>
     <img alt="ExchangeItem" src="../icon/ExchangeItemData.gif"/>
     <a href="../ARCADIA/d2ae09a045c24809afa1cf2d2f3f7a32.html">
      Operational Missions &amp; Capabilities
     </a>
    </li>
    <li>
     <img alt="ExchangeItem" src="../icon/ExchangeItemData.gif"/>
     <a href="../ARCADIA/0289c7bd432d445fa47974d3c31a3995.html">
      Operational Entities, actors
     </a>
    </li>
   </ul>
   <h2>
    Diagrams displaying "Perform SYSTEM NEED ANALYSIS"
   </h2>
   <ul>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_7X41gH-rEe2qMc9GI-nScQ">
      2.2 - First Level Tasks and Exchanges
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_-PVogHZPEe2lVaNV4qOrAA">
      4 - Product Line &amp; Configuration Managers Work
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_rxX4YHZPEe2lVaNV4qOrAA">
      4 - Need Analysis Team Work
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_4PvdkHZPEe2lVaNV4qOrAA">
      4 - Non functional Specialty Engineering Work
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_fASykHZPEe2lVaNV4qOrAA">
      4 - Data &amp; Interface Manager Work
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_9r5fkKhoEe2typM4YPR9TQ">
      2.3 - Use of Definition Perspectives in Engineering Capabilities
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_H3GM8HZQEe2lVaNV4qOrAA">
      4 - Sub-contractor Work
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_sYtmAKbzEe2typM4YPR9TQ">
      2.1 - First Level Tasks of Architecture Definition Perspectives
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_Gy9lUKb2Ee2typM4YPR9TQ">
      1 - High level View of the Method
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_ltMvcHZPEe2lVaNV4qOrAA">
      4 - IVVQ Manager Work
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_P_bbcHZPEe2lVaNV4qOrAA">
      4 - Chief Architect Work
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_XrLmMHZPEe2lVaNV4qOrAA">
      4 - Customer Work
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_l-nVMEouEeCJy6-2bwxnoA">
      3 - Models Management
     </a>
    </li>
    <li>
     <a href="../ARCADIA/75b26b24d42a4962a8d6455734a6aa97.html#_APkCUEZyEeCEcMpZ28zOig">
      3 - Document Building
     </a>
    </li>
   </ul>
  </div>
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